| Affected by the "extreme cold and hot climate" and "world factories",Chinese demand for power supply has increased sharply.At the same time,the peak-to-valley difference in the power grid has appeared.The "peak-to-valley difference" has restricted the development of new energy power generation technologies.The value of electric energy storage equipment is reflected,and the full utilization of Valley electricity load is also an important measure to improve energy efficiency.China’s power generation industry is developing rapidly.In 2018,the total generation capacity of thermal power,hydropower,wind power,nuclear power and solar power generation in the national power system in 2018 was 69936 billion kWh.On the other hand,biomass power generation technology is also steadily developing.Adequate and stable power supply system has driven the flourishing development of Valley electricity thermal storage technology.In recent years,with the support of supporting policies for air pollution control by government departments,the number of haze days in various provinces and cities in winter has decreased significantly,the blue sky project has achieved significant results,and clean energy heating technology has emerged from this.This article introduces a new type of heating equipment based on the principle of solid-state heat storage heating technology,which converts electricity energy into heat during the trough of the power grid,stores it through a solid heat storage medium,and releases heat during the peak hours of the power grid during the day.Through the simulation software to simulate the building envelope structure and building usage characteristics of an office building,the instantaneous maximum thermal load is 636.39kw,and the total thermal load in the whole heating season(151 days)is 238.4mw·h。In most areas of northern China,the heating mode is regional boiler room+heat exchange station.As a clean energy heating mode,solid electric heat storage boiler heating is getting the attention of all walks of life.Based on the simulation results of the office building,the author has formulated two kinds of heat source schemes,i.e.District boiler room+heat exchange station heating and solid electric heat storage boiler heating,and calculated and analyzed their initial investment,operation cost,investment recovery period and environmental benefits.The conclusion is that the initial investment difference between the partial heat storage mode of solid electric heat storage boiler and the heating scheme of district boiler room+heat exchange station is obvious It is not large.The operation cost of the solid-state electric heat storage boiler is about half of the charging standard of the thermal company.The static investment recovery period of the solid-state electric heat storage boiler heating system is 8.23 years compared with the heating charging standard of the thermal company.Compared with the coal-fired heating system in the regional boiler house,the consumption of standard coal in the whole heating season is reduced by 10.0 kgce/m2;the emission reduction of carbon dioxide is 25.0kg/m2,the emission reduction of sulfur dioxide is 102.0g/m2,the emission reduction of nitrogen oxide is 41.9g/m2,and the emission reduction of smoke and dust is 22.6g/m2.The heating energy conservation and emission reduction effect of solid electric thermal storage boiler is significant. |
